Decoupled Opacity Optimization for Points, Lines and Surfaces
Günther T, Theisel H, Gross M (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 36
Pages Range: 153-162
Journal Issue: 2
DOI: 10.1111/cgf.13115
Abstract
Displaying geometry inflow visualization is often accompanied by occlusion problems, making it difficult to perceive information that is relevant in the respective application. In a recent technique, named opacity optimization, the balance of occlusion avoidance and the selection of meaningful geometry was recognized to be a view-dependent, global optimization problem. The method solves a bounded-variable least-squares problem, which minimizes energy terms for the reduction of occlusion, background clutter, adding smoothness and regularization. The original technique operates on an object-space discretization and was shown for line and surface geometry. Recently, it has been extended to volumes, where it was solved locally per ray by dropping the smoothness energy term and replacing it by pre-filtering the importance measure. In this paper, we pick up the idea of splitting the opacity optimization problem into two smaller problems. The first problem is a minimization with analytic solution, and the second problem is a smoothing of the obtained minimizer in object-space. Thereby, the minimization problem can be solved locally per pixel, making it possible to combine all geometry types (points, lines and surfaces) consistently in a single optimization framework. We call this decoupled opacity optimization and apply it to a number of steady 3D vector fields.
Authors with CRIS profile
Involved external institutions
Otto-von-Guericke-Universität Magdeburg
Germany (DE)
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
Germany (DE)
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Switzerland (CH)
How to cite
APA:
Günther, T., Theisel, H., & Gross, M. (2017). Decoupled Opacity Optimization for Points, Lines and Surfaces. Computer Graphics Forum, 36(2), 153-162. https://dx.doi.org/10.1111/cgf.13115
MLA:
Günther, Tobias, Holger Theisel, and Markus Gross. "Decoupled Opacity Optimization for Points, Lines and Surfaces." Computer Graphics Forum 36.2 (2017): 153-162.
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